Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual escola frequentou P Jay Gehrke do Kansas City Royals?
 ###Tabelas: CREATE TABLE by_county_city (by_county_city_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Obama% VARCHAR, Obama# INT, McCain% VARCHAR, McCain# INT) CREATE TABLE population_movement_of_jews_from_former_ussr_in_israel (population_movement_of_jews_from_former_ussr_in_israel_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Births (000s) INT, Deaths INT, Natural Growth INT, Total Fertility Rate VARCHAR) CREATE TABLE supplemental_first_round_selections (supplemental_first_round_selections_id AUTO_INCREMENT PRIMARY KEY, Pick INT, Player VARCHAR, Team VARCHAR, Position VARCHAR, School VARCHAR) CREATE TABLE competitive (competitive_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Round VARCHAR, Ground VARCHAR, Opponent VARCHAR, Score 1 VARCHAR) CREATE TABLE by_access_to_electricity (by_access_to_electricity_id AUTO_INCREMENT PRIMARY KEY, Region VARCHAR, Public network VARCHAR, Own/community generator VARCHAR, Solar panel VARCHAR, Other source VARCHAR, None VARCHAR)  
SELECT School FROM supplemental_first_round_selections WHERE Position = p AND Team = kansas city royals AND Player = jay gehrke